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Beat Frequency In Sound Pipes With Temperature Changes

Two pipes, equal in length, are each open at one end. Each has a fundamental frequency of 479 Hz at 18 C. In one pipe the air temperature is increased to 21 C. If the two pipes are sounded together, what beat frequency results?

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Frequency is given by
<br>f = velocity / wavelength
<br>velocity of sound is dependent on temperature. It is given by
<br>v = 331+0.6T .
<br>Let V1 = 331 ...